Gassantoda Castle, Mountain castle in Yasugi, Japan.
The castle extends across ridges and valleys of Mount Gassan, reaching a height of 180 meters above the Hirose River in Shimane Prefecture.
Built in 1396, Gassantoda Castle served as the stronghold of the Amago clan until 1566 when it fell to the Mori clan after a prolonged siege.
The castle location held importance in Japanese metallurgy as a center for tatara steel production, essential for creating traditional Japanese swords.
Visitors can reach the castle ruins by taking a 60-minute bus ride from Yasugi Station to Gassan-Iriguchi, followed by a 40-minute uphill walk.
The fortress gained its initial control through an inventive strategy when Amago Tsunehisa led his army into the castle disguised as festival dancers.
Location: Yasugi
Location: Shimane Prefecture
Inception: 1396
Part of: 100 Fine Castles of Japan
Website: https://yasugi-kankou.com/en/spot/gassantoda-castle
GPS coordinates: 35.36085,133.18527
Latest update: May 28, 2025 18:30
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